The pressure of refrigerant controls what aspect of that refrigerant?

The correct choice pertains to the relationship between the pressure of refrigerant and its saturated temperature. The saturated temperature is the temperature at which a refrigerant changes state from liquid to gas (or vice versa) at a given pressure. As pressure increases, the saturated temperature also increases, meaning that for any given pressure, there is a specific temperature associated with the refrigerant being in a saturated state.

This relationship is crucial in refrigeration and air conditioning systems, as it allows for the control of the refrigerant's phase changes. For instance, during the evaporation process, as the refrigerant absorbs heat and turns from liquid to gas, managing the pressure helps maintain the appropriate saturated temperature for efficient operation.

While condensation rate, vaporization speed, and cooling efficiency can be influenced by pressure, they are not directly controlled by it in the same straightforward manner as saturated temperature. Thus, understanding the pressure-saturation temperature relationship is essential for optimizing the performance of refrigeration cycles.